uxcell M10 Aluminum Flat Head Rivet Nut Insert Nutsert Silver Tone 100pcs Thread Size: M10/0.4"(D); Product Name: Rivet Nut Material: Aluminum; Weight: 273g Package Content: 100(+/-2%)pcs x Rivet Nut; Main Color: Silver Tone Height: 20mm/0.8" Flat Head Diameter: 17x11mm/0.67"x0.43"(Outer.D*Inner.D)